(a) Some parts of our skeleton are rigid while some other are flexible. Why?
(b) What helps in movement of bones?
(c) Name the mineral essential for formation of bones and teeth.
(d) What is the difference in the matrix of bones and adipose tissue ?
Answers
Answer:
(B)Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.
(C) Calcium. Calcium is a mineral found in many foods. Almost all calcium is stored in bones and teeth to help make and keep them strong. Your body needs calcium to help muscles and blood vessels contract and expand, and to send messages through the nervous system
(D)Adipose tissue, or fat tissue, is considered a connective tissue even though it does not have fibroblasts or a real matrix, and has only a few fibers. Adipose tissue is composed of cells called adipocytes that collect and store fat in the form of triglycerides for energy metabolism.
Explanation:
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